Remove execute bit from CSS files
Remove execute bit from HTML files
Remove execute bit from JavaScript files

These files are in no way executable.
Remove execute bit from PNG files

The execute bit is unnecessary.
Remove execute bit from README

This is not an executable file.
Merge pull request #100 from mgeisler/fix-permissions

Remove execute bit
Prefer id over class for input fields

The class is not really used for CSS, only for selecting the fields
later with JS. Using an id also makes it possible to refer to the
fields from a label element.
Let labels refer to input fields on login screen